The big idea the architect brought to this project was to put a spiral stair in the apse to connect the main level with the lower level. Furthermore, there would be a door out to the back yard halfway down the stair off of a landing. Here are some shots of how we did that. A custom curved stair manufacturer Stairworks built and installed the basic stair and rail. They did a nice job…actually they did a nice job twice. They messed up a measurement the first time and had to completely rebuild it. To their credit, they didn’t even blink and just did it.